function DisplayLeftMenu(imageUrl){
	
	if (document.getElementById('middleLeftMenu').style.display != 'block')
	{
		document.getElementById('middleLeftMenu').style.display = 'block';
		document.getElementById('bottomLeftMenu').style.display = 'block';
		document.getElementById('topLeftMenu').style.backgroundImage="url('" + imageUrl + "/left_top_bg.png')";
	}
	else
	{
		document.getElementById('middleLeftMenu').style.display = 'none';
		document.getElementById('bottomLeftMenu').style.display = 'none';
		document.getElementById('topLeftMenu').style.backgroundImage="url('" + imageUrl + "/bg_category.png')";
	}
}